>> reporter: not yet, john. in fact, right behind me over my left shoulder is the nightclub kiss and inside right now investigators are coming through the rubble looking for clues. they're fairly sure it's related to this pyrotech nicks show. someone apparently had fireworks in their hands. but the investigation continues. i have to say, what's scary about this whole thing, once you get over and look at this nightclub it only has a single entrance and exit. it's squeezed between two buildings. no lateral exits. no exit out of the back. it's a narrow door. when you have 1,000, 2,000 packed into this space at night, the lights are on and off, in some ways this was a tragedy announced you wonder how anyone could have gotten these people out. >> a sea of chaos must have been unimaginable. one of the most disturbing things that we're hearing that security guards may have been blocking people, why might this be? >> well, we have seen a lot, especially on social media, facebook, people commenting at the very beginning